Wrapper



" Oct. 16, 1945. w E. c. SCOTT 2,387,217

' WRAPPER Filed Jan. 22, 1943 fz/ereife C See if INVENTOR ATTEST ATTORNEPatented Oct. 16, 1945 UNITED STATES PATENT OFFICE WRAPPER Everette, C.Scott, Chicago, Ill., assignor to In- 7 dustrial Patents Corporation,Chicago, 11]., a corporation of Delaware Application January 22, 1943,Serial No. 473,159 3 Claims. (Cl. 229-87) This invention relates to animproved wrapper for a package and more particularly to a packagewrapper for insulating a product against heat transfer.

It is an object of this invention to provide an improved unitary packagewrapping means for insulating a product against a heat transfer.

It is another object of this invention to provide a flexible wrapper forprotecting a product against damage by heat transfer.

It is another object of this invention to provide a unitary and flexiblewrapper for shipping a refrigerated product.

Other objects will appear from the description given below.

In the drawing:

Figure 1 is a perspective view of one form of a wrapper embodying theprinciples of this invention.

Figure 2 is a perspective View, partly broken away, of the wrapper asapplied to a'iproduct, and

Figure 3 is a perspective view of another, form of the wrapperstructure.

invention is offered as a solution is to be found 30 in the shipping offrozen confections to outlying points for distribution. As therefrigerating art has been improved and additional smaller storage unitshave been made available to all, the nehas also been suggested, forsmaller units, that flexible blankets made up in a; composite form ofseveral separable elements be used. However,

none of these known forms of containers has been units of frozenproducts whereby they may be easily packaged for shipment. As shown inFi ure 1 the present invention provides a flexible heat insulating layerl0 whichjs adapted to be,-

wrapped around the product. The insulating ma- 7 terial itself may bemade of any of the many materials now available but preferably acellulose product, known commercially as Forest Fleece, is used. Theinsulating layer may be sealed between two sheets of paper with theouter layer ll being made of relatively heavy paper to stand the wearand tear of normal shipping. Fixedly secured to l the inner surface ofthe insulating layer, is a pad of corrugated paper l2 havingcorrugations of such size that a gas flow may take place therethroughwhen the package is completed as will appear more fully below.

The wrapper constructed as above described is not limited in itsapplication to a product or container of a specific size but it may beapplied around products or their containers of varying sizes withinlimits of course and the product enclosed in a properly applied wrapperwill be met-- oughly insulated against heat transfer from out-,

cessity for getting small units of ice cream to side of the package. Theproduct to be wrapped isolated stores, etc., in an economical manner hasarisen.

Since the widespread use of dry ice has come about, it has been used forshipping such frozenconfections in small packages to these outlyin 40stores and the individual packages have been forwarded by bus, train andother forms of transportation which do not have special means forhandling refrigerated products. Many types of packages have beenproposed for the handling of frozen confections together with a lump ofdry ice for shipment and the present invention provides an improvementin this packaging art. I

The usual shipping container for this type of cardboard box havingvarious devices for insulating the walls so that the frozen product maybe placed therein for shipment. The box may be formed in several piecesand many manipulations should be arranged on the layer of corrugatedpaper such that when the wrapper is applied around the periphery of the'material to be shipped, the ends of the corrugated pad will be disposedin abutting relation. This is the pre-- ferred manner of using theinvention but it is not necessary that this be followed in every case.When the product has been wrapped so that the corrugated paper isdisposed around the periphery of the product, a block of carbon dioxideice may be disposed in each end of the package and preferably thecorrugated paper shall extend past the product to provide an upstandingwall surrounda ing the block of ice. After the ice has been placedproduct comprises a substantially rigid corrugated package, the jointsmust be sealed against the free passage of gases.

When the package has been arranged in this must be performed to completethe packaging. It manner, the cold gas flowing from the block of Dry Icemay pass through the flow channels surrounding the product so that theproduct will be maintained at a uniform temperature. It will be seenthat by reason of its flexibility and the arrangement of its elements,the wrapper may be readily adapted to the packaging of orders of varioussizes and the product will be efliciently cooled 'in transit. The sizeof the block of carbon dioxide ice is controlled by the length of timerequired to make the shipment as will be fully understood.

In packaging relatively small orders, the corrugated pad may be longerthan the dimension of the periphery of the product and so when wrappedaround the product, may overlay a portlon of the insulating blanket, butas the blanket is formed of relatively soft material, the corrugationsof the pad may be pressed into the blanket so that the bulk of thepackage may be reduced; This will also serve to prevent circulation ofthe cold gases in that part of the packr the product is well paddedagainst possible damage by jarring.

In Figure 3, another form of the wrapper is shown wherein the insulatingblanket H is ofa length equal to the-periphery of the product beingwrapped so that the blanket will just neatly ,wrap around the product.The inner layer of corrugated paper Ii fixed to the insulating pad I4 isof, the same length. The outer layer ii of this wrapper is of suchlength however that 1. A unitaryand flexible heat insulating wrapper fora product comprising a flexible non-heat conductive layer, an outerflexible covering for said layer, an inner flexible layer having meansfor forming a plurality 'of closely adjoining gas flow passages todirect a circulating gas against substantially the entire periphery ofthe wrapped product, said covering and said inner layer being fixedlyadhered to said non-heat conductive layer, whereby the wrapper may beapplied around a product with said inner layer adjacent the product andwith said outer layer enclosing the product and the other layers to forma heat insulated package for the product wherein a substantially uniformtemperature may be maintained around the product by reason of the gascirculating through said flow passages.

2. A unitary and flexible heat insulating "wrapper for a productcomprising a flexible non-heat conductive layer having dimensions suchthat it may be wrapped around said product to form at least a singlelayer over all sides thereof, an outer flexible covering for thisWrapper having dimensions such that it may be wrapped around saidproduct to form at least two layers, an inner flexible layer havingmeans for forming a pinrality of closely adjoining gas flow passages todirect a circulating gas against substantially the entire periphery ofthe wrapped product, said covering and said inner layer being positivelyadhered to said non-heat conductive layer, whereby the wrapper may beapplied around a product with said inner layer adjacent the product andwith said outer layer enclosing the 85 product and th other layers toform a heat init. may be wrapped around the entire package twice. Theouter sheet l6 thus provides a protective layer for completing thepackage and preventsany possible circulation of air through the crackformed at the ends of the blanket II where they abut.

In using either form of .the invention here shown, the block of Dry Icedisposed at each end of the frozen product evaporates so that theproduct will be cooledand will be maintained frozen. The cool vaporflowing from the carbon dioxide will contact the product as it flowsdown the channels provided around the product by the inner layer ofcorrugated paper and the product will be maintained uniformly coldthroughout.

, per for a product comprising a flexible non-heat It will be noted thatthe corrugated paper forms 7 conductive layer having dimensions suchthat it may be wrapped around said product to form a single layer overall sides thereof, an outer flexible covering for this wrapper havingdimensions such that it may be wrapped around the product to form twolayers, an inner flexible layer having means for forming a plurality ofclosely adjoining gas flow passages to direct a circulating gas againstsubstantially the entire periphery of the wrapped product, said coveringand said inner layer being positively adhered to said non-heatconductive layer, whereby the wrapper may be applied around a productwith said inner layer adjacent the product and with said outer layerenclosing the product and the other layers to form a heat insulatedpackage for the product wherein a uniform temperature may be maintainedaround the product by reason of the gas circulating through said flowpassages.

EVERETI'E C. SCOTT.

